Question

factorizar
x^2-4x-30=15​

Answer 1

Respuesta:

x^2-4x-30=15

We move all terms to the left:

x^2-4x-30-(15)=0

We add all the numbers together, and all the variables

x^2-4x-45=0

a = 1; b = -4; c = -45;

Δ = b2-4ac

Δ = -42-4·1·(-45)

Δ = 196

solucion:

x1=−b−Δ√2ax2=−b+Δ√2a

Δ−−√=196−−−√=14

x1=−b−Δ√2a=−(−4)−142∗1=−102=−5

x2=−b+Δ√2a=−(−4)+142∗1=182=9

   

   

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